CKB/app/Http/Controllers/WarehouseManagement/ProductsController.php

<?php

namespace App\Http\Controllers\WarehouseManagement;

use App\Http\Controllers\Controller;
use App\Models\Dealer;
use App\Models\Menu;
use App\Models\Product;
use App\Models\ProductCategory;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Yajra\DataTables\Facades\DataTables;

class ProductsController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        $menu = Menu::where('link','products.index')->first();
        if($request->ajax()){
            $data = Product::with(['category','dealers']);
            return DataTables::of($data)
            ->addIndexColumn()
            ->addColumn('category_name', function ($row) {
                return $row->category ? $row->category->name : '-';
            })
            ->addColumn('total_stock', function ($row){
                return $row->dealers->sum(function($dealer){
                    return $dealer->pivot->quantity ?? 0;
                });
            })
            ->addColumn('action', function ($row) use ($menu) {
                $btn = '<div class="d-flex">';

                if (Auth::user()->can('delete', $menu)) {
                    $btn .= '<button style="margin-right: 8px;" class="btn btn-danger btn-sm btn-destroy-product" data-action="' . route('products.destroy', $row->id) . '" data-id="' . $row->id . '">Hapus</button>';
                }
                
                if (Auth::user()->can('update', $menu)) {
                    $btn .= '<a href="' . route('products.edit', $row->id) . '" class="btn btn-warning btn-sm">Edit</a>';
                }
                
                $btn .= '</div>';
                
                return $btn;
            })
            ->rawColumns(['action'])
            ->make(true);
        }
        return view('warehouse_management.products.index');
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        $categories = ProductCategory::with('children')->whereNull('parent_id')->get();
        $dealers = Dealer::all();
        return view('warehouse_management.products.create', compact('categories', 'dealers'));
    }    

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $request->validate([
            'code' => 'required|string|unique:products,code',
            'name' => 'required|string',
            'description' => 'nullable|string',
            'product_category_id' => 'required|exists:product_categories,id',
            'dealer_stock' => 'nullable|array',
            'dealer_stock.*.dealer_id' => 'required|exists:dealers,id',
            'dealer_stock.*.quantity' => 'required|integer|min:0',
        ]);
    
        // Create product
        $product = Product::create([
            'code' => $request->code,
            'name' => $request->name,
            'description' => $request->description,
            'product_category_id' => $request->product_category_id,
        ]);
    
        // Prepare dealer stock for pivot
        $pivotData = [];
        if ($request->has('dealer_stock')) {
            foreach ($request->dealer_stock as $stockData) {
                if (empty($stockData['dealer_id']) || !isset($stockData['quantity'])) continue;
    
                $pivotData[$stockData['dealer_id']] = ['quantity' => $stockData['quantity']];
            }
    
            // Attach dealer stock using pivot table
            $product->dealers()->attach($pivotData);
        }
    
        return redirect()->route('products.index')->with('success', 'Produk berhasil ditambahkan.');
    }    

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        $product = Product::findOrFail($id);
        return view('warehouse_management.products.edit', [
            'product' => $product->load('dealers'),
            'dealers' => Dealer::all(),
            'categories' => ProductCategory::with('children')->get(),
        ]);
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, Product $product)
    {
        $request->validate([
            'code' => 'required|string|unique:products,code,' . $product->id,
            'name' => 'required|string',
            'description' => 'nullable|string',
            'product_category_id' => 'required|exists:product_categories,id',
            'dealer_stock' => 'nullable|array',
            'dealer_stock.*.dealer_id' => 'required|exists:dealers,id',
            'dealer_stock.*.quantity' => 'required|integer|min:0',
        ]);
    
        $product->update($request->only(['code', 'name', 'description', 'product_category_id']));
    
        // Prepare pivot sync data
        $syncData = [];
        if ($request->has('dealer_stock')) {
            foreach ($request->dealer_stock as $item) {
                $syncData[$item['dealer_id']] = ['quantity' => $item['quantity']];
            }
        }
    
        // Sync with pivot table
        $product->dealers()->sync($syncData);
    
        return redirect()->route('products.index')->with('success', 'Produk berhasil diperbarui.');
    }    

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy(Product $product)
    {
        // Detach all dealer relationships (optional if using cascade on delete)
        $product->dealers()->detach();
    
        // Delete the product
        $product->delete();
    
        return response()->json(['success' => true, 'message' => 'Produk berhasil dihapus.']);
    }
}